Fault analysis of blue smoke, black smoke and white smoke in diesel generator set

First, diesel generator exhaust black smoke

The black smoke in the exhaust is mainly carbon particles from incomplete fuel combustion. Therefore, the excessive supply of fuel in the fuel supply system, the air intake system is reduced, the cylinder block, the cylinder head and the piston composed of the combustion chamber sealing is poor, the fuel injector injection quality is poor and other factors will make the fuel combustion is incomplete, so that the exhaust smoke. Black smoke from exhaust mainly has the following reasons:

1. High pressure oil pump oil supply is too large or the cylinder oil supply is not uniform

2. The valve seal is not strict, resulting in air leakage and low cylinder compression pressure

3. The air filter inlet is blocked and the intake resistance is large, so that the intake volume is insufficient

4. The cylinder liner, piston and piston ring are badly worn

5. The fuel injector is not working properly

6. Engine overload operation

7. The feed advance Angle of the fuel injection pump is too small, and the combustion process is moved to the exhaust process

8. Diesel electric injection system control failure

The engine with black smoke can be checked and eliminated by high pressure oil pump adjustment, injector injection test inspection, cylinder compression pressure measurement, inlet cleaning, oil supply advance Angle adjustment, gasoline electric injection system fault diagnosis and other work.

Two, diesel generator exhaust white smoke

The white smoke in the exhaust is mainly not fully atomized and burned fuel particles or water vapor, therefore, any fuel can not atomize or water into the cylinder will make the exhaust white smoke. The main reasons for induction are as follows:

1. Low temperature and insufficient cylinder pressure, fuel atomization is not good, especially at the beginning of cold starting exhaust white smoke

2. The cylinder pad is damaged and cooling water seeps into the cylinder

3. The cylinder is cracked and cooling water seeps into the cylinder

4. The water content in the fuel is large

If the white smoke disappears when the engine is warmed up, it should be regarded as normal. If the white smoke is still emitted when the vehicle is running normally, it is a fault. It should be inspected and analyzed by observing whether the cooling water in the water tank is not normally consumed, whether the cylinder is working normally, whether the water in the oil-water separator is too much, etc., to eliminate the fault location

Three, diesel generator exhaust blue smoke

The blue smoke in the exhaust is mainly the result of excessive oil entering the combustion chamber. Therefore, any cause of oil into the combustion chamber will cause the exhaust blue smoke. The main reasons for induction are as follows:

1. The piston ring is broken

2. The oil return hole on the oil ring is blocked by carbon accumulation and loses the scraping function

3. The piston ring opening turns together, causing oil to flow through the piston ring opening

4. Piston ring wear serious or carbon accumulation stuck in the ring groove, lose the sealing effect

5. Air ring up and down the direction of the reverse, the oil into the cylinder burn

6. The piston ring is not elastic enough, the quality is not up to standard

7. Valve duct oil seal improperly assembled or aging failure, loss of sealing effect

8. The piston and cylinder are seriously worn

9. Too much oil is added, so that the oil splash is too much, and the oil ring is too late to scrape the excess oil on the cylinder wall

Generating set exhaust blue smoke will inevitably increase oil consumption, some operators say "burn oil". The ratio of oil and fuel consumption is generally 0.5% ~ 0. 8%, when oil consumption exceeds this value, blue smoke will be produced in the exhaust. Wuxi generator rental engine blue smoke fault, generally through the engine disintegration, inspection, in order to find out the cause and determine the troubleshooting plan. The cooling machine exhausts blue smoke, but the oil consumption is normal, which is related to fuel, and is regarded as normal.

Engine exhaust should generally be checked when the engine is warm, and the change of smoke color in the process of low speed, medium speed, high speed and acceleration of the engine is analyzed.

Jiangsu Meao Power Technology Co., Ltd. is an important manufacturer of diesel generators. The company mainly manufactures and sells diesel generator sets with power of 3-3000kW, mobile power station of 24-600kW, Marine emergency diesel generator set of 24-800kW, gas generator set, heavy oil generator set and all kinds of imported series, special series (trailer, static speaker, mobile lighthouse, container, etc.) diesel generator At the same time, we are engaged in generator set maintenance and after-sale service of generator set accessories.